Ddr3 ram in ddr2 slots, crucial memory
Plug-in boards became less practical for many systems as computers shrank, and the individual chips were not a friendly form for end users who wanted to add memory. DIMMs have contacts on both sides of the module instead of just one, so they allow twice as many for a given size of module. Jan 7,1: Am3 cpu have both ddr2 and ddr3 controllers and maybe some intel cpu too.
By interleaving the memory e.
Fried my mother board but that ddr2 is still working in another computer as we speak NeilPaisnel Jan 2,8: After a memory word is fetched, the memory is typically inaccessible for an extended period of time while the sense amplifiers are charged for access of the next cell.
You can read the cuircitary of some board which have both ddr2 and ddr3 slots like asrock n68c s ucc www.
But as memory sizes got even larger tropic reels slots were inadequate, so the next step was DIMMs dual inline memory module. I actually got a ddr2 stick of ram to fit in a ddr3 slot.
Some DIMMs have chips on only one side; others have chips on both. DIMMs are currently being commonly manufactured with up to four ranks per ddr3 ram in ddr2 slots. Some modules use a small number of high capacity chips and others use a larger number of lower capacity ones, and again there are some systems that are fussy about that. It's a question and that's all it is Some manufacturers also round to a certain precision or round up instead.
They were gone long before wider memory paths came along.
Desktop and laptop systems usually require unbuffered DIMMs, which are slightly faster. The second notch is the voltage key position, which represents 5. As such, LRDIMM memory provides large overall maximum memory capacities, while addressing some of the performance and power consumption issues of FB memory induced by the required conversion between serial and parallel signal forms.
I was wondering if the slot was the same or not Any Jackass will notice if it is not physically compatible if tried. Common types of DIMMs include the following: Look up the specs of the computer to find out which type of module it takes and the maximum capacity it can handle. Serial presence detect[ edit ] DDR3 memory utilises serial presence detect.
Some motherboards can take both kinds, though if you put unbuffered memory in a server you will only be able to install a small number of modules if they work at all. DDRDand capacity variants, modules can be one of the following: Servers use registered modules, which allow more memory to be installed in a system.
Fully buffered modules cannot be used with motherboards that are made for registered modules, and the different notch position physically prevents their insertion. Since all ranks share the same buses, only one rank may be accessed at any given time; it is specified by activating the corresponding rank's chip select CS signal.
You often had to put in a LOT of chips. There are cases where a system may be able to handle a single-sided module of a given capacity but not a double-sided module, or the other way around. Some history on memory modules. For any given computer, the RAM modules that can be used are the ones it was designed for.
There would also be one extra chip per group of eight, which is not counted. In this case, the two-sided module is single-ranked. Each one was only 8 bits wide 9 if parity was implemented so you had to add them in sets: Bending the pins was a hazard. In most cases, a motherboard will accept only one type of memory.
Of these non-standard specifications, the highest reported speed reached was equivalent to DDR, as of May And they frequently came loose and stopped working reliably; opening up an old PC to press the chips back into their sockets was a common occurrence.
Lol a 3y old thread. Memory rank Sometimes memory modules are designed with two or more independent sets of DRAM chips connected to the same address and data buses; each such set is called a rank.
This is because DDR3 memory modules transfer data on a bus that is 64 data bits wide, and since a byte comprises 8 bits, this equates to 8 bytes of data per transfer. He was simply wondering if it would work before actually finding out for himself